Apply to cone 04 bisque. Apply 2-3 smooth, even coats. Fire to shelf cone 06. Clean up with water. Directions: Apply with smooth, even strokes. Most Envision Glazes are overglaze compatible. Always refer to label instructions for proper application and usage. Most colors may be mixed together to create custom colors with no changes in application or performance. Envision Glazes reds and greens can be fired simultaneously with no special precautions. Non-Toxic. ................All Duncan Envision Glazes are safe for use on food containers when properly applied and fired to shelf cone 06.